Reenforcement device



Oct. 17, 1933. l.. Y. RANDALL I 1,931,269

REENFORCEMENT DEVICE Filed Nov. 23, 1932 111111 Mmmm.;

L, Y Ronda/ gru/vento@ Patented Oct. 17, 1933 EE'NFOYBCEMENT v DnviG i Luius Y. nandalll-Gaffnsyjs;C;i 1

Y4 Claim;l (Cl. 139-66) This invention relates to means forr reenforcing and `holding in proper position certain connec tions in the dobbyhead of a dobbyloom and more,

especially to the connections between the rocker 6j arm and the jackknives ina dobby loom.

dobby head the rocker arms: have .upwardly and downwardly extending arms which rocker arms are mounted 'on arshaft horizontally disposed.

15 of bothY the upper and lower jackknives `for ref ciprocating the fjackknives for engaging the jack hooks to operate the harness of theloom to raise and lowerthesame to form the pattern. lIt is a' Well known fact that in connections heretoforey 2(1);usedV between the rockerarmsiandgthe. ends of the `jackknivesthat a certain amountof -wear and play hasresulted whichicausesixnproper manipulation of ,the jackknives and Vit isan gobject of :this invention to provide reenforcing .means 25 for the connections betweenrtheV rockerarmand the end of the jackknives whereby more efticient operation can be effected.

Some of the objects of the invention having been stated, other objects will appear as the de- 30 scription proceeds when taken in connection with the accompanying drawing, in whichv Figure 1 is a side elevation of a portion of a dobby head showing my invention attached to one of the rocker arms; :415-15 Figure 2 is a top plan view of the connections between the rocker arm and the jackknife';

Figure 3 is a longitudinallsectional view taken along the line 3 3 in Figure 2; Y

Figure 4 is a transverse sectional view taken opalong the line 4 4 in Figure 1;

Figure 5 is a bottom plan view of one of the members forming a part of my invention;

Figure 6 is a side elevation of the other portion of my invention. 45,. Referring more specifically to the drawing, the "numeral 10 indicates one of the side frame portions of the dobby head which has conventional dobby fingers 11 therein for controlling conventional jack-hool-:s 12 and as is well known in the 50 -art, upper and lower jackknives 13 are provided, 'A 4`.their ends moving infslots 14 disposed` on opposite sides of the dobby head and being provided in frame members 10. On opposite sides of the dobby head suitable rocker arms 15 are provided, 5,5 `the lower portion of one of these rocker arms be'- J 30 and 31.

ing shown in Figure 1, which rocker arms have. suitable slots 16 .the'rein'in .whichfa bolt 17'is adjustably mounted which bolt'penetrates a mem` ber 18 slidably secured onco'nnectingrod 19t.

, The other end of the connecting Arod is pierced 60 It is arwell-known fact thatin one` typev of by fa bolt 20 which pivotally 'securesconnecting rod 19*` to forkedA lug 121,which' lug is penetrated by the' roundedj end 22' of jackknife 13. The structure thus far described is conventional and on account'of tliefloose connection between con-A 55 necting lrod 1'9 and forked lug 21 by me'ansof t bo1t's4204 there is a' certain amount of side play allowed anda'fter the connectionbetw'een forked` lug 21 the portion 2'2 of jackknife 13 has become worn it' allows a certain amount of sidewise move- 70` i ment 'offmember -21 and results in that end of v s the jackknifenottraveling at the -prop'er speed,"

The conventional connecting rod also* has threadably secured-thereon nuts l25 vand 26 for' confining lug 18 `on connecting rod 19.4 y 75 In order to overcomel the objections to the above described conventional mechanismfI provide-.a reenforcing and stabilizing arrangement-for pre-- venting undue -play in the" connections between the rocker arms 15 and the jackknives- 13L"I8Q `provide a mechanism which can bel easilyw''inv stalledv on connecting rod 19^without`the necessity of disconnecting the connecting rod l19 from eitherthe lug 18 or the lug 21 and without the necessity of disconnecting the lug 18 from rocker arm 15 or lug 21from Vjackknife 13. For installation of connecting rod 19 between nuts 26 and the end of forked lug 21, I provide two/members Member 31 is shown more in detail in Figure 6 and has cylindrical projectingportion 32 having a bore longitudinally thereof with a slot 33 cut inv one sidevthereof so the member 31 can be inserted on Vconnecting rod 19,without yto t against the arcuate end of the two portions of forked member 21. On the rear face of vertically disposed portion 34 vis provided a cavity 135 for the reception ofY theunthreadedendof threaded screw 37 mounted in upstanding projection 38 on member 31.

This screw 37 has a portion 39 usually hexagonal and made integral with screw 37 bymeans of which the screw 37 can be turned. Screw 37 1055 is threadably secured in a hole penetrating projection 38 andhas a lock nut40 thereon for securing the screw 37 in adjustedposition. Member 30, as above stated, has upwardly projecting portion 38 Which extends on down on opposite 110i sides of member 30 for strengthening the same and prevents its spreading apart, because member 30 has a slot 42 in the lower side thereof so that this too can be slipped over rod 19 when the parts 30 and 31 are turned to a position to cause slots 42 and 33 to coincide. Member 30 has a cavity 43 in one end thereof adapted to receive one face of nut 26. Member 30 has an enlarged longitudinally disposed cavity 44 into which projecting portion 32 of member 31 fits ina slidable manner. room for screw 3'7 and lock nut 40.

In attaching members 30 and 31 to aconnecting rod 19 all that is necessary is to loosen nuts 25, and 26 and to ymove portion lgslightlyto the left in the figures to allow room forinsertion of members 30 and 31 on the rod 19, or if desired, screw 37 can be screwed down into projection 38 t so as to allow barrel 32 of member 30 to be slipped further intocavity 42 of member 30, and member 31 has its barrel portion inserted in the cavity 44 of member 30 and slots 33 and 42'in the two members are placed in coinciding position and the members are slipped sidewise onto rod 19 and then the slot 33 in member 31 assumes a position where it opens laterally and member 30 is turned so the slot-42 is member 30 assumes a position where it opens downwardly and then nuts 25 and 26 are adjusted to the proper position and then screw 37 is turned to cause its right hand end in the drawing to enter cavity 35 and the arcuate face of member 31 occurring in portion 34 is pressed snugly against the arcuate end of they forked lug21 in this position the parts are adjusted to form a rigid forcing mechanism for sense only and not for purposes of limitation, the

scope of the invention being set forth in the appended claims.

I claim:

1. In` a dobby loom having rocker arms and Member 30 is cut away as at 45`to allow g jackknives and having a connecting rod pivotally connected to the end of each rocker arm and the end of each jackknife,a reenforcing member `comprising telescoping members havinglongimembers apart from each other and to force the n outer end of said members against portions of the connecting rod for reenforcing and stabilizing the same.

2. In a dobby head Yhaving rocker arms and jackknives and connecting rods disposed between the ends of the rocker arms and theends of the jackknives, a reenforcing member comprising two members telescopically mounted with relation to each other having slots therein permitting insertion of. said members onto said connecting rod, said members being rotatable With relation to each other and adjustable means on one member for engaging the other member for adjusting the overall space occupied by the two members.

3.J In a dobby loom having a dobby head provided with rocker arms and jackknives and connecting rod pivotally Vconnected to rocker arms and said jackknives, a reenforcing member insertable on said connecting rod without'disconnecting said connecting rod from therocker arms and jackknives, said member comprising two hollow members having'slots in Vone side thereof for insertion -onto the connecting rod, one of said hollow members being slidably mounted on the other hollow member and means for spreading the hollowk members apartfrom each other.

4. A reenforcing device insertable on a rod and the like comprising two hollow members having slots in their side portions extending into the hollows in said members, said members being telescopically mounted and being rotatable with relation to each other "and means forrspreading said members apart on said rod.

` LUCIUS Y. RANDALL. 

